Adjustable head for lamp sockets



July 21, 1936. w. DABGIN ADJUSTABLE HEAD FQR LAMP SOCKETS Filed April 26, 1935 INVENTOR WILLIAM DABGIN ATTORNEY Patented July 21, 1936 UNITED STATES FAT'ENT OFFICE ADJUSTABLE HEAD FOR, LAltIP SOCKETS William Dabgin, New York, N. Y.

Application April 26, 1935, 'Serial No. 18,339

Claims.

7 This invention relates to new and useful improvements in adjustable heads for lamp sockets. The invention has for an object the construction of adjustable heads which are each charac- 5 terized by a solid cylindrical body supporting a positive and a negative pole, a hollow semi-spherical shell having a pair of parallel spaced slots and mounted on said cylindrical body, and a pair of conductor strips pivotally mounted on said posl0 itive and negative poles and extending through said slots and pivotal along the slots, and at their outer extremities supporting a lamp socket. The arrangement permits the lamp socket to be pivoted in a plane parallel with the planes of the slots in the semi-spherical shell. A feature of the construction resides in the fact that the conductor strips performs a joint function, namely, the pivotal supporting of the lamp socket and theconducting of the electric current to the lamp socket. A further important object of the invention is the provision of novel means for insulating the conductor strips from the hollow semi-spherical shell so as to prevent short circuiting. 1

More particularly, the invention contemplates the provision of insulation'material encasing the conductor strips, and insulation blocks mounted on the conductor strips and slidably arranged along the edges of the slots in the semi-spherical shell in a. particular manner.

'3 A further object of the invention is the provision of a means for converting a floor lamp into a table or bridge lamp or vice versa. g

' A further object of the invention is the construction of a device as described which is simple and durable and which can be manufactured and sold at a reasonable cost. v

For further comprehension of the invention and of the objects and advantages thereof, reference 'willbe had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are moreparticularly set forth.

In the accompanying drawing forming amaterlal part of this disclosure:-

A j Fig. 1 is a front elevational view of a lamp with an adjustable head constructed according to this invention. l

Fig. 2 is anelevational view of a wall bracket with an adjustable head constructed according to the same invention.

Fig. 3 is an elevational view of a ceiling bracket with an adjustable head constructed according to this invention.

Fig. 4 is a fragmentary perspective detailed view of the adjustable head embodying the, invention- .cylindrical body I0. the wires not shown for the supply of electricity. 50 7 Fig. 5 is a horizontal sectional view taken on the line 55 of Fig. 4.

Fig. 6 is a fragmentary vertical sectional view .taken on the line 66 of Fig. 4.

Fig, 7 is a horizontal sectional view taken on the 5 line 1l of Fig. 6.

Fig. 8 is a sectional view taken on the line 88 .of Fig. 6.

adjustable heads according to this invention.

. The invention may best be understood by first examining Figs. 4-8 inclusive. 'head comprises a solid cylindrical body I!) sup- The adjustable porting a positive pole H and a negative pole I1 A hollow semi-spherical shell l3 having a pair of parallel spaced slots I4 is formed with a base cylindrical portion I3 mounting upon said cylindrical body l0. A pair of conductor strips l5, 16 are pivotally mounted on said positive and negative poles, one conductor strip on each pole, and ex tend through the slots l4 and are pivotable along saidslots. A lamp socket I1 is supported upon the conductor strips 15 and I6 and electrically connected therewith. The conductor strips I5 30 and I6 are insulated against being short circuited .with the edges of the slots !4 as hereinafter further amplified.

The cylindrical body I0 is mounted, within a .casing' ill which is provided with anipple 10 at' its bottom extremity. This nipple is adapted to be mounted upon various electrical fixtures as shown in Figs. -1, 2, 3, and 11. In Fig. l the nipple 10 .is shown supporting the cylindrical body upon a lamp 2B. This lamp is of conven- 4.0

tional hollow, construction so that wires, not shown, may pass therethrough and through the nipple 10 to reach the poles II and I2. The details of these wires and their connection with the poles will not be given in this specification since 4.5 such construction is generally known in the art. Attention is called to the strips of material 2| .and 22 extending through passages in the solid These strips connect with The base cylindrical portion I3 of the hollow semi-spherical shell is removably supported by reason of a plurality of depressed portions 23 from the sides thereof frictionally engaging the outer surface of the casing Ill. 5

'of the body ID.

'the poles II and I2.

The pole II is integral with a transverse bar II attached'by screws 24 upon the top surface to facilitate the understanding of the construetion it is stated that the socket is formed with a shell contact into which the lamp za screws, and an end contact which electrically connects with the end contact of the lamp 28. strip I5 connects with one of the contacts .of the socket I1 and the conductor strip I6 with the other contact so as to form the electric circuit through the socket and thus through the lamp.

The conductor strip I5 is encased with sheet insulation material I5" andthe' conductor strip I5 is encased with'sheetinsulationmaterial I6. An insulation block 29 is mounted upon each of the conductor strips and upon the insulation covering material thereof andis of a width so that one side 29 thereof is adapted to be in intimate contact withfone side of the slot I4, and the diametrically opposite side 29 of the block is formed with a groove 29 simultaneously engaged on the diametrically opposite edge of the slot I4.

The arrangement is such that the groove 29 restrains the insulation block from moving longitudinally in the slot I4. The groove 29 is of arcuate shape corresponding with the curvature the drawing) pass.

on the extremity of the stem"30..

. for repairing the device;

.of the semi-spherical 'shellyand the pintles 26 are arranged'upon the axis of the semi-spherical shell so that the blockv29 .may freelymove during pivoting of the conductor strips.

The slots I4 are formed .with cutouts I4 of a sufiicient length to receive the blocks 29 so that the conductor strips I5 and I6 may be manually flexed laterally to disengage thegrooves 1.9 when it is desired to remove the hollowsemi-spherical shell I'3 from itspositiomwhich may be necessary Springs 30 aremounted on the socket I I in the vicinity of the cutouts. I4

and normally engage against the sidesof the insulation material I5 and [6' of the conductor .st ripstonormally prevent the accidental en agement of the blocks 29 into the cutouts I 4".

In Fig. 1 the dot and dash lines .of thelamp indicate the extremities of .the adjustabilityoflthe lamp. {The lamp may. be moved to any intermediate position. Friction ,between contacting parts is depended upon to maintain the lamp as 7 set.

In Fig. 2 a wall bracket 32 is'shown secured upon a wall 33, and supportsone of the adjustable 7 heads according to this invention. The wall bracket 32 is provided with a hollow stem, 33 through which the electric wires (not,.shown .on The nipple II) is attached I The dot and dash ylines in this .fi gure indicate the extreme positions ofadjustment of the lamp 28. v Inl igv 3 a ceiling bracket 34 isshown attached to a ceiling 35. This ceiling bracketis provided with a hollow stem 36 through which the electric wires (not'shown on the drawing) pass. The nipple I 0 ,of the adjustable head is .attached on the sendof the stem [36. The dot ,anddash lines represent the extremities .of adjustment of the lamp 28. The parts may .be' recognized by The pole I2 is set into a transtrical connector 40.

to receive and electrically connect with a head The conductor said strips, and insulation on the strips; for pro- ..material for :supporting the lamp in theadjusted position, i I

2. An adjustable head for .lampsocketscomprising a solid cylindrical-body supporting a. posinumerals corresponding with numerals of identical parts in the previous description.

In Figs. 9 and 10 an adjustable head is shown provided with a shell 38. This shell comprises an inverted cup extending over the semi-spherical shell and attached upon the lower end of the socket H. The purpose of this'shell is to prevent uninformed persons from inserting metallic objects through the slots I4 which may produce a short circuit. 7

In Fig. 151 a lamp base 20 is shownlconverted' into the floor'base of a lamp stand by 'an elec- This connector is adapted piece 4I upon which two of the adjustable heads are mounted. The parts of the adjustable heads may be recognized by' the reference numerals .which correspond with the parts previously described. The base 20, connector 40 and head piece-4| are provided with self contained electrical wiring. I 7 The connector Allis provided with a-screwplug 40 atone end adapted to .engag'e a corresponding female inemberlflf andat the other end of con-'- .ne ctor III) .a,female member 40* is .provided which is adapted ,to receive a corresponding screwplug 4N1. arrangement makes it possible to safely convert one type of lamp into another without changing any'of the wiring While Ihave illustrated and described the preferred embodiment of my invention, .it is to V understood that I do notJimit myself to the pre- 'cise construction ,herein disclosed and the right is {reserved to all changes andmodificatio'ns coming within the scope of the invention vasidefined in ,the appended claims. a

-Having' thus described my inventicn.,'what- .I claim as vnew, and desire to secure .by, ,United States Letters Patent isz- ,1; Anadiustable head for lamp sockets, chmshell havinga pair .of .parallelspacedslots formed able along the slots, .alamp socket supportedon s ;.4.0 -prising afsolid cylindrical body.supporting.a.posi tire and a negative pole, a hollowsemi-spherical .tection against short circuiting with the. edges of the slots, comprisingsheet covering material-upon the strips and insulation bl0cks on the-covering tive and a negative -pole,.a hollow semiaspherical strips pivotally mounted onsaid positive and negative poles coaxial-withan axisof the semispherical shell and extending,through -saidaslots strips for protection against short .circuiting with the vedges of the ..slots, comprising "sheet covering material .upon. the .strips and -msulation blocks on the covering .material, ,saidin- .70 'sulation .blocks having -one=4 f their. sides ;slidably-engaging oneeflthe sides .ofthe ,slotsand Jthe other of their sides formed with groouesengaged (with the other sidesof the slots.

.andpivotable along theslots-a lampsocket #1 Hsupportedonjsaid strips, and insulation ;on the 3, an adjustable ,head for lamp seeket jcp ggs prising a solid cylindrical body supporting a positive and a negative pole, a hollow semispherical shell having a pair of parallel spaced slots and formed with a base cylindrical portion mounted upon said cylindrical body, a pair of conductor strips pivotally mounted on said positive and negative poles coaxial with an axis of the semi-spherical shell and extending through said slots and pivotable along the slots, a lamp socket supported on said strips, and insulation on the strips for protection against short circuiting with the edges of the slots, comprising sheet covering material upon the strips and insulation blocks on the covering material, said insulation blocks having one of their sides slidably engaging one of the sides of the slots and the other of their sides formed with grooves engaged with the other sides of the slots, each of the said slots being formed with a cut out area to permit the conductor strip to be flexed so that the block engages therein and the groove thereof disengages from the edge of the slot.

4. An adjustable head for lamp sockets, comprising a solid cylindrical body supporting a positive and a negative pole, a hollow semi-spherical shell having a pair of parallel spaced slots and formed with a base cylindrical portion mounted upon said cylindrical body, a pair of conductor strips pivotally mounted on said positive and negative poles coaxial with an axis of the semispherical shell and extending through said slots and pivotable along the slots, a lamp socket supported on said strips, and insulation on the strips for protection against short circuiting with the edges of the slots, comprising sheet covering material upon the strips and insulation blocks on the covering material, said insulation blocks having one of their sides slidably engaging one of the sides of the slots and the other of their sides formed with grooves engaged with the other sides of the slots, each of said slots being formed with a cut out area to permit the conductor strip to be flexed so that the block engages therein and the groove thereof disengages from the edge of the slot, and means for normally holding the strips against flexing into positions in which the blocks engage in the cutouts.

5. An adjustable head for lamp sockets, comprising a solid cylindrical body supporting a positive and a negative pole, a hollow semi-spherical shell having a pair of parallel spaced slots and formed with a base cylindrical portion mounted upon said cylindrical body, a pair of conductor strips pivotally mounted on said positive and negative poles coaxial with an axis of the semispherical shell and extending through said slots and pivotable along the slots, a lamp socket supported on said strips, and insulation on the strips for protection against short circuiting with the edges of the slots, comprising sheet covering material upon the strips and insulation blocks on the covering material, said insulation blocks having one of their sides slidably engaging one of the sides of the slots and the other of their sides formed with grooves engaged with the other sides of the slots, each of the said slots being formed with a cut out area to permit the conductor strip to be flexed so that the block engages therein and the groove thereof disengages from 'the edge of the slot, and means for normally holding the strips against flexing into positions in which the blocks engage in the cutouts, comprising springs mounted on the socket and engageable against the sides of the insulation of the said conductor strips.

WILLIAM DABGIN. 

